Level of difficulty (1 being easiest, 10 being hardest: 4

Alcohol above 90-proof is flammable and can help you start fire. The high proof alcohol can also be used to sterilize open wounds, and take the edge off of painful injuries. In addition to potential life-saving uses, alcohol is also tasty to drink. But, you didn't need us to tell you that.

[via outdoorlife.com]